Fastening means for crushing-rolls.



J. GOFF.

FASTENLNG MEANS FOR CRUSHLNG RoLLs.

APPLILCATLON FILED SEPT. 30, 1915.

Patented/1812137 2, 1916.

WITNEssEs.- cl2/eme @om INVENTOR,

I. l mi BY i 1` Alim/Hey nnrrnn sfrnfrns! Para FFQE.

JESSE GOFF, 0F WEBB CITY, MISSOURI, ASSIGNOR OF ONE-HALF TO DANIEL F. BUTLER,

v 0F WEBB CITY, MISSOURI.

FASTENING MEANS FOR CRUSHING-ROLLS.

Specification of Letters Patent.

Patented May 2, 1916.

.To all whom t may concern.'

Be itknown that I, JESSE Gori, a citizen of the United States, residing at Webb City, in the county of Jasper and State of Missouri, have invented a new and useful Fastening Means for Crushing-Rolls, of whlch the following is a specication.

This invention has reference to crushing mills of the roller type, and its object is to provide rollers with active portions readlly replaceable in a minimum time at a mm1- mum expenditure of labor.

Roller mills of the type of the present invention are employed in mines for crushing dirt, and each roller comprises a hub portion and a rim or shell portion, the latter being the part which is subjected to the wearing action of the dirt and which requires renewal at frequent intervals. Ordinarily the peripheral or shell portion 1s keyed on to the hub portion of the roller, and in the case of the master or driving roller, it is in the ordinary construction necessary to remove the driving gear so that the whole procedure consumes several hours time and an excessive amount of labor, during which time the mill cannot do any work.

In accordance with the present invention the shell portion and the hub portion have a taper t and are connected together by .a key construction at all times readily accesslble and of a nature providing a cushion connection which avoids breakage of the outer shell.

There are usually three sets of rollers to a mill and the shells wear in from two to three weeks, while the driving gear weighs from 400 to 600 pounds. With the arrangements previously used the time required in changing shells is not less than five hours. With the present invention the same operation is performed in from one to one and one-half hours, whereby there is a material saving in time and labor.

The invention will be best understood from a consideration of the following detailed description, taken in connection with the accompanying drawings forming part of this specification, withl the further understanding that while the drawings show a practical form of the invention, the latter is not confined to any strict conformity with the showingvof the drawings, but maybe changed and modified so long as such changes and modilicatons come within the scope of the appended claims.

ln the drawings Figure l is a side elevation of a pair of rollers and their mountings, with the rollers constructed in accordance with the present invention. Fig. 2 is a section on the line 2-*2 of Fig. l. Fig. 3 is a section on the line 3 3 of Fig. l, but drawn on a larger scale. Fig. 4 is a perspective view of one of the cushion-like wedges employed. Fig. 5 is a perspective view of a cam-shaped gripping member.

Referring to the drawings there is shown a frame 1 without any attempt to show any particular structure thereof, such frame serving merely the purpose of a supporting frame and a carrier for journal bearings 2, 3, the latter being movable toward and from the journal bearings 2 and urged toward the journal bearings 2 by elastic means such as springs 4.

Mounted in the journal bearings 2 is a shaft 5 carrying a taper hub 6 forming part of a crushing roll. The bearings 3 carry a shaft 7 on which is mounted a hub 8 forming part of another crushing roll coacting with the lirst-named crushing roll. The shaft 5 is provided with a gear wheel 5a by means of which the roller mounted on the shaft 5 is rotated to cause the crushing of material introduced between the two rollers, the spring permitting the rollers to separate to any necessary degree.

The two rollers may be in most particulars alike, and hence similar parts in the two rollers are referred to by the same reference characters. The taper hub 6 carries a corresponding tapered shell 9 having marginal flanges l() on opposite sides. The hub 8 carries a taper shell ll, but free from side fianges, the shell being exteriorly cylindrical and entering between the flanges l0 of the shell 9. Such shells constituting the outer renewable members of the rollers act upon the dirt to be crushed, which dirt is introduced between the rollers and it may be assumed that the rollers rotate in opposite directions, as indicated by the arrows in Fig. l. The smaller ends of the vhubs 6 and 8 are directed toward that side of the machine remote from the gear wheel 5a. The result of this is that either shell l0 or l1 may be removed from the respective hub 6 or 8 by moving it lengthwise of the hub t0-V from a cam 14C having teeth 15 orother similar biting surfacing. The ears 12 are so disposed that when the stems 13 are seated therein the cam blocks are opposite the corresponding face of the shell 9 or 11, as the case may be. There are also provided elongated wedges 16 which may be made of wood, the other parts which have been described being made of metal. The wedges 16 are driven between the cam blocks 14: and the corresponding face of the shell 9 or 11, so that each cam block is turnedl on the axis of the stem 13 in Vthe direction to force the teeth 15 into the wooden wedge 16, thus holding the latter in place by positive engagement since any frictional engagement between such parts would be very small. The other face of the wedge, however, has extended frictional engagement with the corresponding face of the shell of the roller, so that there is practically no liability of the wedge loosening, and so long as the wedge cannot move on the shell of the roller,

kthe cam block cannot loosen. Furthermore,

the cam block and wedge are so arranged that any tendency of the shell to turn on the hub during the operation of the roller is exerted in a direction to force the wedge more iirmly into the clamping position and to turn the cam block in a direction to press with greater force upon the wedge. Since the wedge is of wood it is of a far more elas-.

tic nature than the shell, or the cam block,

and consequently the wooden wedges serve as cushions yielding to some extent to strains tending to burst the shells. The result is that the shells are preserved from injury by the cushioning action of the wooden wedges.

Then the shells have become so worn as to necessitate replacing them, which condition is reached in from two or three weeks of use,pthere is no need of removing the gear 5a from the shaft 5, nor the hub 6 from said shaft, nor the hub 8 from the shaft 7.

All that is needed to remove the shafts from is an easy matter to loosen the shells from the hubs because of the tapering connection between the two. New shells may be substituted, the cam blocks returnedto position, and the wedges 16, or new wedges 16,

driven into place when the mill is ready for use. In actual practice this may be performed in from an hour to an hour and a half in a mill containing three sets of rollers instead of consuming no less than ive hours where the rollers arelreyed into place for the hub, the hub at its smaller end hav-` ing exterior lugs with passages therethrough, rotatable cam heads carried by Vthe lugs, and wedges fitting between the camv heads and the corresponding face rof the shell of the roll, the cam heads having the cam surfaces roughened to bite into the wedges.

3. A roll for a crushing mill, comprising a taper hub, and a shell with a taper seat for the hub, the hub at its smaller end having exterior lugs with passages therethrough, rotatable cam heads carried by the lugs, and wedges fitting between the cam heads and the corresponding face of the shell of the roll, the cam heads having the cam surfaces roughened to bite into the wedges, andl said wedges being constructed of wood, with the other portions of the roll constructed of metal.

4. A roll for crushing mills, comprisinga hub member and a shell member withl their meeting parts axially tapered to t, connecting means on one end face of one member and extending over the corresponding end face of the other member, and wooden members lodged between the respective connecting means and the adjacent face of .the

said other member, whereby the wooden` taper hub and an exterior shell having aV corresponding interior taper Vseat on the hub, and said hub having exterior wedges and securing means therefor to hold the` shell in place.

6. A roll for crushing mills comprising a taper hub and a shell with an interior taper fittingthe hub, said hub having exterior ears at the smaller end, cam blocks removably carried by and rotatable in the ears and extending over the corresponding i face of the shell, and wedges adapted to enter between the cam blocks and the corre- 1 sponding face of the shell.

10 the corresponding face of the shell, the

Wedges being of a material into which the roughened portions of the cams Will bite.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of tWo Witnesses.

JESSE GOFF.

Witnesses:

l/V. D. CLOVER, J. S. ALLIsoN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner o1 atents,

Washington, D. C. i 

